San Francisco. A commenter informs: "It was filmed only four days before the quake and shipped by train to NY for processing. Amazing but true! Which would place the date of filming on Saturday, April 14, 1906."
Not speedy, those old streetcars.
Those are cable cars, notice the slot between the rails. There were some streetcars (trolleys) crossing Market Street, notice the electric pickup (trolley) on them.
Cable cars are still not speedy.